Physics problems
- 1. Metals are good conductors of electricity because
Options- A. The atoms are lightly packed
- B. They contain free electrons
- C. They have high melting point
- D. All the above Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO, IT Trainer
Correct Answer: They contain free electrons
Explanation:
Metal particles are held together by strong metallic bonds, which is why they have high melting and boiling points. The free electrons in metals can move through the metal, allowing metals to conduct electricity.
Because the electrons in the atom's higher energy levels can separate from the atoms easily, they can be pulled out with very little energy. Because the molecular structure of the metal is such that 'free electrons' are free to move, thus being categorized as electrically conductive.
For example, copper is used for electrical wiring because it is a good conductor of electricity.
- 2. The Length of the Day is determined in
Options- A. length of the hours
- B. length of the year
- C. astronomical units
- D. solar terms Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: astronomical units
Explanation:
The Length of the Day is determined in Astronomical Units.
The length of a day corresponds to the time the Earth takes to turn around on its axis, which is approximately 24 hours. But it's not exactly 24 hours.
This phenomenon is due to tides raised by the Moon which slow Earth's rotation. Because of the way the second is defined, the mean length of a day is now about 86 400.002 seconds, and is increasing by about 1.7 milliseconds per century.
- 3. Which of the following is a Non Renewable Resource of Energy?
Options- A. Wind Power
- B. Hydrogen Fuel
- C. Natural Gas
- D. Solar Energy Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank PO, IT Trainer
Correct Answer: Natural Gas
Explanation:
Natural Gas is a Non Renewable Resource of Energy because that does not renew itself once used, unlike the other choices.
It is a resource that will not be naturally replenished.
- 4. What frequency range is the high frequency band?
Options- A. 3 kHz
- B. 3 to 30 MHz
- C. 30 to 300 MHz
- D. 10 GHz Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO, Database Administrator, IT Trainer
Correct Answer: 3 to 30 MHz
Explanation:
The HF band is based on frequencies 3 to 30 Mhz. AM radio stations are in the HF band but normally are stated in kilohertz.
- 5. Air pressure is measured in which of the following units?
Options- A. Steridian
- B. kg/mts
- C. Newton
- D. Pascal Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Pascal
Explanation:
Pressure = (Net Force) / (Applied area) = Newton / square meters
Measuring units of pressure are:
. Pascal
. Bar
. Torr
. Pounds per square inch (psi)
. Standard atmosphere (atm).
- 6. What is the main function of an ignition safety switch? Also asked in: Analyst, Bank Clerk, Bank PO
Correct Answer: An ignition safety switch is a safety device can shut off the engine if the operator falls off the PWC or out of the powerboat, or is otherwise thrown from the proper operating position How it works: It allows the engine of the vehicle to shut off or to be turned off immediately as it is to prevent further complications to happen as this is being used when an emergency is launched Where it is used: Most powerboats and PWCs come equipped by the manufacturer with an emergency engine cut-off switch
- 7. Malleability and Ductility of metals can be accounted due to
Options- A. the crystalline structure in metal
- B. the interaction of electrons with metal ions in the lattice
- C. the presence of electrostatic force
- D. the capacity of layers of metal ions to slide over the other Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: the capacity of layers of metal ions to slide over the other
- 8. Which results in an increase in power?
Options- A. doing more work in less time.
- B. doing less work in more time.
- C. doing less work in less time.
- D. doing more work in more time. Also asked in: AIEEE, Bank Exams, CAT, GATE, GRE, Analyst, Bank Clerk, Bank PO, Database Administrator, IT Trainer
Correct Answer: doing more work in less time.
Explanation:
Doing more work in less time, results in an increase in power to do a work.
- 9. Which method of expressing direction is indicated in the illustration?
Options- A. Section
- B. Interjuction
- C. Intersection
- D. None of the above Also asked in: Bank Exams, AIEEE, Bank Clerk, Analyst
Correct Answer: Intersection
- 10. Which alternative energy source is exhaustible?
Options- A. tidal energy
- B. wind energy
- C. solar energy
- D. geothermal energy Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: geothermal energy
Explanation:
Based on conventionality in deriving energy, energy sources could be classified as
Conventional ::
coal, oil, hydro, nuclear, etc... sources which can be used up or exhaustible.
(and)
Non - conventional ::
solar, wind, tidal, geothermal, biogas, etc... sources which are not exhausted.
Among the given options, Geothermal energy is the alternative energy source among all the choices that are given in the question, that is exhaustible.
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